fix(theme-saas): add margin-bottom:4px for select-dropdown flip to top

[shenjunjian]

PR

select的下拉面板翻转到上面的时候，应该在底部有4px的间距

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our Commit Message Guidelines
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Documentation content changes
• Other... Please describe:

What is the current behavior?

Issue Number: N/A

What is the new behavior?

Does this PR introduce a breaking change?

• Yes
• No

Other information

Summary by CodeRabbit

• Style
  • Improved vertical spacing for the select dropdown component by adding a small bottom margin.

[coderabbitai]

Walkthrough

A bottom margin utility class (mb-1) was added to the select dropdown component's CSS, alongside the existing top margin class (mt-1). This change updates the vertical spacing around the dropdown popper element by providing additional margin below it.

Changes

File(s)	Change Summary
packages/theme-saas/src/select-dropdown/index.less	Added mb-1 class to the dropdown popper for extra bottom spacing.

Poem

A dropdown floats with margin neat,
Now cushioned both above and beneath.
With mb-1 and mt-1 in tow,
The popper’s spacing’s set to go!
CSS tweaks, a gentle breeze—
Dropdowns land with stylish ease.
🐇✨

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📥 Commits

Reviewing files that changed from the base of the PR and between f98b936 and 1b8b1dc.

📒 Files selected for processing (1)

• packages/theme-saas/src/select-dropdown/index.less (1 hunks)

🔇 Additional comments (1)

packages/theme-saas/src/select-dropdown/index.less (1)

27-30: Ensure proper bottom spacing when flipped to top
Adding @apply mb-1; alongside the existing @apply mt-1; on the popper variant provides the intended 4px margin beneath the dropdown panel, matching the spacing above it and satisfying the PR objective of proper flip-to-top spacing.

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[petercat-assistant]

Walkthrough

This PR addresses a UI issue where the select dropdown panel, when flipped to the top, lacked a margin at the bottom. The change introduces a 4px margin-bottom to ensure proper spacing.

Changes

File	Summary
packages/theme-saas/src/select-dropdown/index.less	Added @apply mb-1; to ensure a 4px margin at the bottom when the dropdown flips to the top.

[petercat-assistant]

Ensure that the @apply mb-1; correctly applies a 4px margin. Verify that this change does not affect other dropdown positions or styles.

[zzcr]

theme默认的样式不需要修改嘛？

[shenjunjian]

不需要修改， 我们的主题整改时，已经修改实现了。